Small update after a full day of usage:
The only nagging problem I have is that on calls, Bluetooth incoming audio is very quiet. My own audio is clear (I listen to my music via a stereo Bluetooth dongle), but on calls I can barely hear the other person. I've tried this with two different Bluetooth devices, both of which work on my old phone. I've noticed others have mentioned quiet audio as well. It doesn't bother me much because I don't have any shame in holding the tablet to my ear, but it's a caveat to anyone else if making calls via Bluetooth is important to you.
Other than that, everything else seems to be working very well.